Paving-rammer.



PATENTED MAY 2, 1905.

.W- A. GHILDREY. PAVING HAMMER.

APPLICATION FILED MAR. 1, 1905.

3 SHEETS-SHEET 1.

lwanl'oz q/vdneawa PATENTBD MAY 2, 1906..

w. A; GHILDREY. PAVING HAMMER.

APPLIGATIQN FILED MAB. 1, 1905.

3 SHEETS-SHEET 2.

5"??? 23.; atl ovnma PATENTBD MAY 2, 1905. w. A. GHILDREY.

PAVING HAMMER.

, APPLICATION FILED MARJ, 1906.

a sHBnTssHEBT a.

5'1 men-Lion STATES Patented May 2, 1905.

PATENT FFICE.

WAYNE AUBREY GHILDREY, OF RICHMOND, VIRGINIA, ASSIGNOR OF ONEdl'ALF TO ALVIN C. PUGH, OF RICHMOND, VIRGINIA.

PAVING-HAMMER.

SPECIFICATION forming part of Letters Patent N0. 788,7 51, dated May 2, 1905.

' Application filed March I, 1905. Serial No. 2&7370- To (0 whom it rim/y concern.-

Be it known that I, WAYNE AUBREY (ii- Hi DREY, a citizen of the United States of America, and a resident of the city of Richmond, in the State of Virginia, have invented a new and useful Improvement in Paving-Rammers, of which the following is a specification.

This invention relates to paving-rammers in the form of wheeled vehicles; and it consists in an electric paving-rammer and in certain novel combinations of parts embodied therein, as hereinafter set forth and claimed.

The objects of the invention are to render practicable and effective the operation of a paving-rammer by electricity, to provide a power-actuated paving-rammer that is compact and easily movable from place to place, to render the actuation of the drop-hammer of the machine wholly automatic, to provide for automatically advancing the machine after each stroke of the drop-hammer, and to provide for guiding and otherwise controlling the operation of the machine from an operatives seat on the vehicle.

The specific electric paving-rammer hereinafter described is adapted to take the current from an overhead wire and to be pulled around by a boy or to be put into a wagon by two men, and thus taken from place to place.

Three sheets of drawings accompany this specification as part thereof.

Figure 1 is a side elevation of the improved paving-rammer. 2 is a top view with the trolley-pole and the standard of the operatives seat in cross-section. Figs. 3 and 4 are front elevations showing the hammer respectively in its raised and lowered positions. Fig. 5 is a fragmentary sectional view showing a pawl-and-ratchet device hereinafter described. Fig. 6 is a fragmentary top view showing the hoisting-drum in its alternative position as compared with Fig. 2. Fig. 7 is a top view of the detachable tongue by which the machine is dragged from place to place, and Fig. 8 is a fragmentary elevation projected from Fig. 7.

Like reference characters refer to like parts in all the figures.

A suitable vehicle to carry the working parts of the rammer and an operative is com-- posed of a horizontal platform (1, provided beneath with a pair of rigid pedestals 7) and at its front end with a rotatable fork c, a rotary axle (Z, mounted in said pedestals and provided at its ends with a pair of ground-wheels 1 and 2, one, or it may be both of them, made fast thereon, as illustrated, by a lockingpin 2', (shown in dotted lines in Fig. 2,) a pilotwheel 3, mounted in said fork, means for turning said fork c and pilot-wheel 3 to guide the machine, comprising a hand-lever e, a connecting-rodf', and a lever-arln g, the latter fast on the vertical pivot at of said fork c, and an operatives seat It, having a telescopic standard 5 and a ciiishioning-spring 6, as shown in Fig. 1.

Between the front and rear wheels the platform a is provided with a central opening? (shown in Fi 2) and with a pair of vertical guides v and j at the sides of said opening, the latter constructed in common with laterally-bracing knees Sand supported beneath the platform by front and rear braces 9 and 10. Between these guides at cross-head I: is slidable up and down, and to the bottom of this cross-head a suitable drop-hammer Z is detachably fastened, as shown in Figs. 3 and at. Above the top of said guides '11 and 7' the spindle of a sheave m is mounted in suitably-oil'- set supports 11 and 12, attached to the tops of the respective guides, as shown in Figs. 1 to 4, inclusive, and a suitable flexible connection 12 hereinafterspoken of as the rope, extends from an eye 13 at the top of said cross-head, over said sheave m, to a hollow spirallygrooved drum 0, within which its drum end is made fast. This drum 0 is loose and longitudinally slidable on a horizontal constantmotion shaft 7), supported by suitable pillowbloeks 1a and 15 above the platform a and having fast thereon one member 16 of a suitable clutch, the othermembcr of which (shown at 17) is carried by'the near end of the drum. The other end of the drum 0 is constructed with a ratchet-wheel 18, integral therewith and having its toothed rim spaced away from the end of the drum sufiicientl y to form aneck or groove 19, Fig. 6.

The drum 0 is clutched to the shaft 2 after each descent of the drop-hammerl by the following combination of parts: An attachment in the form of an eye 20, carried by the drophammer cross-head It at its front, embraces a depending rod 21, the lower end of which is headed and provided with a cushioning-spring 22. The upper end of said rod 21 is connected by a knuckle-joint 23 to the front end of a suitably-bent lever 24, pivoted in said support 11 at the top of the guides t and j and terminating behind the guides in a clutch-fork 25, which occupies said groove 19 of the drum. As the drop-hammer Z reaches the lower eX- tremity of its movement said eye 20 contacts with said cushioning spring 22 and therethrough moves lengthwise said rod 21, which transmits its motion through said fork-lever 24.- 25 to the drum 0, so as to throw the drum into clutch with the fast clutch member 16, as in Fig. 2. The drum 0 is automatically unclutched from the shaft 1) when reelevated by the contact of the drop-hammer cross-head It with a suitably-bent portion of said lever 24, so as to move the fork 25, and therewith the drum, to the left. A pawl 18, to interact with said ratchet-wheel 18, is pivoted to a suitable extension of said pillow-block 14: and is provided with a weight g or its equivalent, whereby it is normally held out of contact with the ratchet-wheel, as in full linesin Fig. 5. Astop-lug 26, Fig. 5, on said pillow-block 14limits the movement of the pawl out of mesh. WVhen it is desired to hold the drop-hammer Z in elevated position, as in Figs. 1 and 2, the pawl 18' is tilted into the position in which it is shownin dotted lines in Fig. 5, so as to contact with the ratchet-wheel 18 while the drophammer is moving upward, and the pawl and ratchet then prevent the descent of the drophammer when the drum 0 is subsequently unclutched. Said constant-motion shaft further carries at its left-hand end a sprocketpinion 27, and the rotary axle (Z is provided in the same longitudinal plane with a loose sprocket-wheel 28, the two being connected by a suitable chain 29, accommodated by a hole or holes in the platform a. The driven sprocket-wheel 28 is provided with one member 31 of a suitable clutch, the other member of which (shown at 32) is slidable onthe axle (Z and is normally retracted. It is automatically moved intoits efi'ective position, in which it is shown in dotted lines in Fig. 2, by a folding tappet 33, carried by the drop-hammer crosshead 76 at its back, and a suitably-bent lever 34, mounted in pivotal bearings 37 and 38, beneath the platform a, and terminating in a clutch-fork 32, which occupies the groove of the slidable clutch member 32. The same clutch-groove is conveniently occupied in part by the fork of a hand-lever r, pivoted to the rear end of the platform a and projecting upward within reach of the operative occupying the seat it.

construction.

.mitting gearing 33' and 34'.

Upon the platform a, conveniently in front of the drop-hammer guidesi and j, a trolleypole s is erected. For the purposes of the present invention this pole or an equivalent attachment may be of any known or improved A spring-supported trolleypole of telescopic construction is shown as means to adapt the machine to be readily connected with an overhead wire, the same being adapted to be readily compacted when the machine is to be moved from place to place.

An electric conductor tconnects the trolleypole at with an electric motor a, supported upon the platform a and conveniently located directly above the rear axle d, with its shaft '0 parallel to said constant-motion shaft 10 and connected therewith by suitable power-trans- This motor a may also be of any known or improved construction.

To provide for readily dragging the machine around or from place to place by hand, the fork c, in which the pilot-wheel 3 is mounted, is provided with a pair of laterally-projecting stud-pins 35 and 36, and a detachable rigid tongue 20, Figs. 7 and 8, is provided, having a bifurcated rear end, the extremities 35 and 36' of which are C-shaped, as shown in Fig. 8, and thus adapted to interlock with said stud-pins 35 and36 and to resist accidental detachment.

Having thus described said improvement, I claim as my invention and desire to paten under this specification 1. An electric pavingrammer having in combination a wheeled vehicle, a drop-hammer and an electric motor mounted on said vehicle, means for connecting said motor with an electric conductor, means for periodically transmitting hoisting power from said motor to said drop-hammer including a constantmotion rotary shaft, and means for periodically transmitting propelling power to one or more of the vehicle-wheels from said shaft.

2. An electric paving-rammer having in combination a wheeled vehicle, a drop-hammer and an electric motor mounted on said vehicle, means for connecting said motor with an electric conductor, means for periodically transmitting hoisting power from said motor to said drop-hammer including a constantmotion rotary shaft, means for periodically transmitting propelling power to one or more of the vehicle-wheels from said shaft, and an automatic device controlling the transmission first named.

3. An electric paving-rammer having in combination a wheeled vehicle, a drop-hammer and an electric motor mounted on said vehicle, means for connecting said motor with an electric conductor, means for periodically transmitting hoisting power from said motor to said drop-hammer including a constantmotion rotary shaft, means for periodically transmitting propelling power to one or more of the vehicle-wheels from said shaft, and an automatic device controlling the transmission last named.

4. An electric paving-rammer having in combination a wheeled vehicle, a drop-ham mer and an electric motor mounted on said vehicle, means for connecting said motor with. an electric conductor, means for periodically transmitting hoisting power from said motor to said drop-hammer including a constantmotion rotary shaft having one member of a clutch fast thereon and a drum loose thereon carrying the other clutch member, and means for shifting said drum lengthwise into and out of clutch.

5. An electric paving-rammer having in combination a wheeled vehicle, a drop-hammer and an electric motor mounted on said vehicle, means for connecting said motor with an electric conductor, means for periodically transmitting hoisting power from said motor to said drop-hammer including a constantmotion rotary shaft having one member of a clutch fast thereon and a drum loose thereon carrying the other clutch member, and means for transmitting shifting movements to said drum from said drop-hammer.

6. The combination, in a paving-rammer, of a wheeled vehicle, a drop-hammer and a motor mounted on said vehicle, means for transmitting hoisting power from said motor to said drop-hammer including a constant-motion rotary shaft having one member of a clutch fast thereon and a drum loose thereon carrying the other clutch member at one end and at its opposite end a ratchet-wheel, means for shifting said drum out of clutch to lower the drop-hammer, and a pawl adapted to be interlocked with said ratchet-wheel at will to retain the drop-hammer in elevated position.

7. The combination, in a paving-rammer, of a wheeled vehicle having a driving-axle, a drop-hammer and a motor mounted on said ve- 'hicle, means for transmitting hoisting power from said motor to said drop-ham1ner including a constant-motion rotary shaft, means for transmitting propelling power from said shaft to said axle including a sprocket-pinion fast on said shaft, a sprocket-wheel loose on said axle and provided with one member of a clutch, a chain connecting said wheel and pinion and a normally retracted clutch member slidable on said axle, and means for shifting said slidable clutch member into clutch.

8. The combination, in a paving-rammer, of a wheeled vehicle having a driving-axle, a drop-hammer and a motor mounted on said vehicle, means for transmitting hoisting power from said motor to said drop-hammer including a constant-motion rotary shaft, means for transmitting propelling power from said shaft to said axle including a sprocket-pinion fast on said shaft, a sprocket-wheel loose on said axle and provided with one member of a clutch, a chain connecting said wheel and pinion and a normally retracted clutch member slidable on said axle, and means for transmitting shifting movement from said drop-hammer to said slidable clutch member to shift the same into clutch.

9. The combination, in a paving-rammer, of a wheeled vehicle having a driving-axle, a drop-hammer and a motor mounted on said vehicle, means for transmitting hoisting power from said motor to said drop-hammer including a constant-motion rotary shaft, means for transmitting propelling power from said shaft to said axle including a sprocket-pinion fast on said shaft, a sprocket-wheel loose on said axle and provided with one member of a clutch, a chain connecting said wheel and pinion and a normally retracted clutch member slidable on said axle, and means for transmitting shifting movement from said drop-hammer to said slidable clutch member to shift the same into clutch, such transmitting means including a tappet carried by the drop-hammer cross-head and a suitably-bent lever arranged to contact with said tappet during each upward movement of said cross-head and terminating at said slidable clutch member in a clutch-fork, substantially as hereinbefore specified.

WAYNE AUBREY CI-[IL'DREY- Witnesses:

G. A. HANSON, ALVIN (3. Push. 

